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// 改为使用后台返回url下载文件
方法1：这个会导致在点击下载按钮的时候，页面会跳转到奇怪的url。
window.location.href = row.downloadUrl
方法2：点击下载按钮，不会在新窗口打开。
const downloadRes = async () => {
let response = await fetch(row.downloadUrl)
let blob = await response.blob()
let objectUrl = window.URL.createObjectURL(blob)
let a = document.createElement('a')
a.href = objectUrl
a.download = row.fileName
a.click()
a.remove()
}
downloadRes()
// 后台返回文件流下载文件
fileDownload(row.id).then((res) => {
this.downloadFile(res, row.taskName)
})
fileDownload是下载的接口地址，看下图
export function fileDownload(id) { return request({ url:
'/vehicle/offlineFile/download/' + id, method: 'get', responseType: 'blob', }) }
downloadFile方法代码如下：
// 通用下载方法
export function downloadFile(data, filename) {
const content = data
const blob = new Blob([content], {
type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
//文件类型
})
if ('download' in document.createElement('a')) {
const elink = document.createElement('a')
elink.download = filename
elink.style.display = 'none'
elink.href = URL.createObjectURL(blob)
document.body.appendChild(elink)
elink.click()
URL.revokeObjectURL(elink.href)
document.body.removeChild(elink)
} else {
navigator.msSaveBlob(blob, filename)
}
}